Our Calculations


Offset Product Pricing

Placing a cost on one’s carbon production and is a task fraught with educated assumptions. There are an endless assortment of variables that must be taken into consideration – from determining an individual’s carbon contribution on a flight to computing the carbon load from shipping freight up the inside passage. Weather, jet capacity, sea conditions, fuel efficiency and an array of other factors all interact to complicate the calculations and there is no end to how one could drill down into the nitty gritty to make a precise determination of true carbon cost.

It is within this reality that we operate. Like other carbon offset programs, the Juneau Carbon Offset Fund has had to make some assumptions. At the same time, we have scoured the great work of a good many researchers and carbon expert studies, from government agencies, to major airlines to university climate specialists, for the most accurate numbers possible. We believe our calcualtion to be honest and accurate. Most importantly, we know that the cost of our carbon products align perfectly with the emissions savings of our carbon elimination program. This is the most important aspect of carbon offsetting.

There are two primary estimates we make in our carbon offset calculations: your carbon emissions and the cost of offsetting that emission. Taking the latter first, the cost of our offsetting is based on the gallons of heating oil saved (not burned) once an air source heat pump is installed in the home and replaces an oil heat system. This is a forward-looking calculation that projects the annual average savings in carbon emissions across the number of years of estimated useful life of the heat pump. The average annual heating fuel (diesel #2) used by Juneau households is 780 gallons. When burned, a gallon of diesel creates 22.4 pounds of CO2 emissions.

Sources: Juneau Renewable Energy Strategy, p32 / U.S. Energy Information Administration

These values work together to derive a per pound cost for our carbon offset products of $0.015 / pound.

The more challenging estimate is your carbon emission because of the tremendous variation in carbon emitted depending on the size and type of aircraft, ship, car, or home heating system, not to mention weather and an array of other factors. Examples include an individual’s share of a flight’s carbon creation, a traveler’s share of the carbon emissions from a diesel jet boat whale watching excursion, or a home owner’s carbon output from home heating with an oil-burning stove. Like other carbon offset programs, the Juneau Carbon Offset Fund has had to make some assumptions based on expert studies in published reports. We believe our numbers to be honest and accurate. 

Your carbon offset purchase for x pounds of carbon creation will prevent the production of x pounds of carbon by eliminating the burning of a corresponding quantity of heating oil. We offer you a true one-to-one offset solution.


Below are listed some of the data sources that we have used to generate our numbers. We realize there are many different studies and considerations to assist in determining the climate impacts of different activities so we’ll be reviewing and updating our assumptions about our product costs periodically.


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